I got a question from a US puzzler about printing the 15x15 on US Letter size paper(which is a bit shorter and wider than A4).

One way of getting it to print on one page:

- in the print options, for the header and footer select "blank" for each option- for 'scaling' select 90% (so if there's an option 'ignore scaling' somewhere else, deselect that)- remove the top 'info line' by clicking the X on the right